A downside of this is that when your vehicle is full of C4, it's also extra vulnerable to enemy fire. One unsuspecting enemy can fire a shotgun at the jeep and watch it suddenly go sky high. You could almost see the WTF expression on his face.
For extra boss points you can go full throttle over a ramp and crash the jeep into a low flying helicopter.
It's even better when you start receiving hatemail from players.